We represent floorplans as a set of closed polygons, which is consistent with the groundtruth annotations in Structured3D [1]}.
The advantage of this representation is that the thickness of inner walls is implicitly provided by the distance between neighboring room polygons (see Fig. REF , right column).
Alternatively, HEAT [2]} predict floorplans as planar graphs, which means that the walls of adjacent rooms are represented by a single shared edge in the graph. In particular, this simpler graph representation can approximate the true floorplan only up to the thickness of the walls.
Furthermore, to train HEAT, an additional pre-processing step is required which merges the groundtruth edges of neighboring polygons into a single shared edge.
It is important to note that the evaluation still runs on the unmodified groundtruth floorplans.
Therefore, during evaluation, HEAT performs a post-processing step to obtain a set of closed room polygons from the estimated planar graph.
